Concrete and stone cutter



2 Sheets-Sheet 1 July 10, J BQDE CONCRETE AND STONE CUTTER Filed April 5, 1955 R H 0 m w A 2 m W Y G B, w r W wl|| |l| 5 f a Z; p d 9 0 Z M a J 5 Z 5 m 4 ||Y M 7 4 r 5 ,H o 12 4 w r M r M, W J fl fl y 0, 1956 J. -J. BODE CONCRETE AND STONE CUTTER 2 Sheets-Sheet 2 Filed April 5, 1955 5 m. 6 r 5/ ;/A/ A 1 w/w V QX y W M INVENTOR.

JUJEPH A 500.5

mar): w ATTQZ/VEYS CONCRETE AND STONE CUTTER Joseph J. Bode, Harrah, Okla.

Application April 1955, Serial No. 499,313

3 Claims. (Cl. 125-23) This invention relates, in general, to concrete and stone cutters.

At the present time it is customary to manufacture concrete blocks that are cut in two and used for building material. The cutting or splitting causes a rock face or rough face which is desirable in building. When the cutting is done with a straight blade cutter, it is not very successful in that there is a great deal of breakage.

One object of the present invention is to equalize the pressure of a row of knives, carried by each of two jaws, as the jaws close on a block, and then to semi-lock the blades in position, as the pressure is increased and the block is cut.

In the curing of blocks they sometimes curve with a bend in the center. Other times they cure with a hard part at the edge.

With a straight blade cutter the curved blocks break across the center thus ruining the block; while with blocks that are hard at one end the block breaks on one end only and this causes half of one side to break out, and so ruin the block.

With a cutter in accordance with this invention, pressure is equalized, both for blocks with a bend, or bow, in them, and for blocks with hard places in them so that in each case the block is cut in the desired manner.

Further objects and purposes, and characteristics of this invention will appear as the description progresses, reference being had to the accompanying drawings, showing, solely by way of example, and in no way in a limiting sense, one form which the invention can assume.

In the drawings:

Figure l is a schematic view, showing how the knives of the two jaws conform with the faces of blocks to be cut;

accordance with this invention with parts broken away;

Figure 3 is a sectional view on line 33 of Figure 2, and viewed in the direction of the arrows:

Figure 4 is a sectional view on line 4-4 of Figure 2 anw viewed in the direction of the arrows; and

Figure 5 is a sectional view on line 5-5 of Figure 4, and viewed in the direction of the arrows.

Referring now to the drawings, the cutter has a fixed frame, with top and bottom members 6 and 7, and grooved side rails 8 and 9, and is mounted on a base 10.

Suitably supported in the fixed frame is a block 11 to be cut, and both above and below the block is a slidable frame, each having side plates, 12 and 13, held together by spacers and rivets 14. These frames are slidable in grooves 15 in the members 8 and 9.

The lower slidable frame is supported by abutments 16 and 17 adjustable by screw means 18 in height.

The upper slidable frame can be power-operated toward the lower one by a piston 19 in a cylinder 20, and controlled by pressure through pipes 21 and 22 by means of a valve 23, in an obvious manner.

The two slidable frames are alike, and thus, a description of one should suflice for both.

Figure 2 is a front elevational view of a cutter in 'j nited States Patent 0 ice Considering the upper fame, the piston 19 operates on a bearing bar 24, which rests at its ends on shoulders 25 of the frame 26 and thus constitutes a part of the frame. In the bearing bar 24 is a wide curved seat 27, receiving a wide curved shoulder 28 on a main rocker arm 29.

The arm 29 in turn has two wide curved seats 30 and 31 in which seat curved shoulders 32 and 33 of secondary rocker arms 34 and 35. The rocker arms 34 and 35 each have two curved shoulders 36, 37, 38 and 39 which bear on the tops of four knives 40, 41, 42 and 43. These knives have their cutting edges aligned, and are rockingly supported in the frame, as with knife 43, by a pin 44, carried by the frame, and received in a slot 45, in the knife with a spring 46 between the pin and one end of the slot.

The rocker arms 29 and 34 and 35 are all floatingly supported in their frame by springs at the ends thereof. For example, arm 29 is supported by spring 47 positioned between a lug 48 on the frame, and 2. lug 49, on the arm. At its other end it is supported in the same manner by spring 50.

The rocker arms 34 and 35 are supported in the same way. For example, the outer end of arm 35 is supported by spring 51, between lugs 52 and 53.

With the construction as above described, when pressure is applied to bar 24, the two sets of knives are forced against the surfaces of block 11 and accurately conform to the block faces by virtue of the knives rocking on their pins, and the rocker arms rocking in their bearings. As pressure builds up the various parts in the frame are semi-locked in their proper adjusted positions, and the block is cut as desired, whether it be curved, or contains hard parts at the edges, ends or other places.

The way in which the knives conform to the faces of the block, is illustrated in three different cases in Figure 1, as is obvious from the drawing.

The above specific description of one form of the invention has been given solely by way of example and is not intended in any manner in a limiting sense.

All modifications, variations and adaptations such as fall within the scope of the appended claims are intended to be protected by this disclosure.

What is claimed is:

1. In a concrete and stone cutter, a vertical frame having upper and lower cross members and side rails having facing vertical grooves, upper and lower cutter assemblies in said frame between said cross members, said assemblies comprising frames having cross fixed bars and side bars, the side bars being slidably confined in the grooves of said side rails, the assemblies being similar but reversed with respect to each other with the cross bar of the upper assembly frame adjacent the upper cross member of the vertical frame and the cross bar of the upper assembly frame at the lower end of the lower assembly frame, the cross bars having long central curved seats, main rocker bars at the inward sides of the cross bars having on one side long central curved projections bearing in the long seats, said main rocker bars having longitudinally spaced long curved seats on their opposite sides, longitudinally spaced secondary rocker bars at the inward sides of the main rocker bars, said secondary rocker bars each having a long curved projection severally engaged in the seats of the main rocker bars, said secondary rocker bars having each a pair of longitudinally spaced long curved projections on their inward sides, knives at the inward sides of the secondary rocker bars having outer ends and inner cutting ends, the outer ends of the knives bearing severally against the projections of the secondary rocker bars, side plates on the assembly frames between which the main rocker bars, secondary rocker bars, and knives are slidably confined between the cutter assembly side bars, means mounting the knives on said side plates for vertical movement relative thereto, and pressure means for forcing the cutter assemblies toward each other.

2. In a concrete and stone cutter, a vertical frame having upper and lower cross members and side rails having facing vertical grooves, upper and lower cutter assemblies in said frame between said cross members, said assemblies comprising frames having cross fixed bars and side bars, the side bars being slidably confined in the grooves of said side rails, the assemblies being similar but reversed with respect to each other with the cross bar of the upper assembly frame adjacent the upper cross member of the vertical frame and the cross bar of the upper assembly frame at the lower end of he lower assembly frame, the cross bars having long central curved seats, main rocker bars at the inward sides of the cross bars having on one side long central curved projections bearing in the long seats, said main rocker bars having longitudinally spaced long curved seats on their opposite sides, longitudinally spaced secondary rocker bars at the inward sides of the main rocker bars, said secondary rocker bars each having a long curved projection severally engaged in the seats of the ma rocker bars, said secondary rocker bars having each a pair of longitudinally spaced long curved projections on their inward sides, knives at the inward sides of the secondary rocker bars having outer ends and inner cutting ends, the outer ends of the knives bearing severally against the projections of the secondary rocker bars, side plates on the assembly frames between which the main rocker bars, secondary rocker bars, and knives are slidably confined between the cutter assembly side bars, means mounting the knives on said side plates for vertical movement relative thereto, and pressure means for forcing the cutter assemblies toward each other, first floating spring means acting between the main rocker bars and the assembly frames, second floating spring means acting between the secondary rocker bars and the assembly frames, and third floating spring means acting between said mounting means and the knives.

3. In a concrete and stone cutter, a vertical frame having upper and lower cross members and side rails having facing vertical grooves, upper and lower cutter assemblies in said frame between said cross members, said assemblies comprising frames having cross fixed bars and side bars, the side bars being slidably confined in the grooves of said side rails, the assemblies being similar but reversed with respect to each other with the cross bar of the upper assembly frame adjacent the upper cross member of the vertical frame and the cross bar of the upper assembly frame at the lower end of the lower assembly frame, the cross bars having long central curved seats, main rocker bars at the inward sides of the cross bars having on one side long central curved projections bearing the long seats, said main rocker bars having longitudinally s accd long curved seats on their opposite sides, longitudinally spaced secondary rocker bars at the inward sides of main rocker bars, said secondary rocker bars each having a long curved projection severally engaged in the seats of the main rocker bars, said secondary rocker bars having each a pair of longitudinally spaced long curved projections on their inward sides, knives at the inward sides of the secondary rocker bars having outer ends and inner cutting ends, the outer ends of the knives bearing severally against the projections of the secondary rocker bars, side plates on the assembly frames between which the main rocker bars, secondary rocker bars, and knives are slidably confined between the cutter assembly side bars, means mounting the knives on said side plates for vertical movement relative thereto, and pressure means for forcing the cutter assemblies toward each other, said pressure means comprising wedge means acting between the cross bar of the lower cutter assembly and the lo cross member of the vertical frame for vertically adjusting the lower cutter assembly in the vertical frame.

References Cited in the file of this patent UNITED STATES PATENTS 2,152,193 Johanning Mar. 28, 1939 2,557,098 Graham et al. June l9, l95l FOREIGN PATENTS 830,473 Germany Feb. 4, i952 

